[#CMP-750] NullPointerException in CompassEventListener when trying to configure an HibernateMirrorFilter

Compass

NullPointerException in CompassEventListener when trying to configure an HibernateMirrorFilter

Created: 21/Oct/08 04:29 PM Updated: 22/Oct/08 06:08 PM

Component/s:

Compass::Gps

Affects Version/s:

None

Fix Version/s:

2.1.0 GA

Description

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Hi,

I tried to implement HibernateMirrorFilter and got a NullPointerException during initialization in
org.compass.gps.device.hibernate.embedded.CompassEventListener. In a closer look I realized that is caused by this line:

compassHolder.mirrorFilter = (HibernateMirrorFilter) ClassUtils.forName(mirrorFilterClass, compassHolder.compass.getSettings().getClassLoader()).newInstance();

since compassHolder.compass is null at this time. It is set after this code block:

compassHolder.compass = compassConfiguration.buildCompass();

Moving this statement in front of the class loader solved it. Please update in trunk.

Thanks

All

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Shay Banon added a comment - 22/Oct/08 06:08 PM

Fixed. Note that it is preferable to implements Compass built in event listener (for example PreCreateEventListener) if there is no need for the actual Hibernate event objects. This works better when using cascading with Compass as well as does not tie you to Hibernate specifically.